List of practice Questions

Turner’s syndrome in humans occurs due to:

The commonly used vector for human genome sequencing was/were:

Select the option that gives the correct identification of ovum, morula, and blastocyst in a human female reproduction system as shown in the following diagram: \textit{(Refer to the provided diagram.)}

Study the table given below: \begin{center} \begin{tabular}{|c|l|l|} \hline Contraceptive & Mode of Action
\hline A. The pill & I. Prevent sperm reaching cervix
B. Condom & II. Prevent implantation
C. Vasectomy & III. Inhibits ovulation
D. Copper-T & IV. Semen contains no sperm
\hline \end{tabular} \end{center} Select the option where contraceptive/contraceptive method are correctly matched with their mode of action:

A list of organisms is given in column ‘R’, whereas in column ‘S’ a list of products produced by them: \begin{center} \begin{tabular}{|c|c|} \hline Column ‘R’ (Organisms) & Column ‘S’ (Products)
\hline \textit{Lactobacillus} & Cheese
\hline \textit{Saccharomyces cerevisiae} & Curd
\hline \textit{Aspergillus niger} & Citric acid
\hline \textit{Acetobacter aceti} & Acetic acid
\hline \end{tabular} \end{center} Select the option where the organisms are correctly matched with the product:

Hugo de Vries proposed the mutation theory of organic evolution after his experiments on:

Which of the options has correct identification of ‘P’, ‘Q’, and ‘R’ in the illustration of ‘Central Dogma’ given below?

Identify the category of genetic disorder depicted in the pedigree chart given below:

Study the following diagram of Transverse Section of a young anther of an angiosperm:
\textit{(Refer to the provided diagram)}
Select the option where parts ‘A’, ‘B’, and ‘C’ are correctly identified.

In a fertilized ovule of an angiosperm, the cells in which \(n\), \(2n\), and \(3n\) conditions respectively occur are:

Menstrual phase

Luteal phase/secretory phase

Explain the ovarian and uterine events taking place along with the role of pituitary and ovarian hormones, during menstrual cycle in a normal human female under the following phases:
Follicular phase/proliferative phase

Why do plants discourage self-pollination? State any one reason.

Explain any four devices that flowering plants have developed to encourage cross-pollination.

Explain any three diagnostic techniques for the detection of cancer.

Write two differences between malignant tumor and benign tumor.

Mention the two events of Plasmodium life cycle that occur within the female Anopheles body.

Describe the life cycle of Plasmodium from the time it enters the human body till a female Anopheles mosquito bites an infected person.

“The influence of both the alleles in a heterozygous state is clearly expressed in codominance.” Explain with the help of inheritance of ABO blood group in humans.

Name the type of age pyramid shown above for Rwanda.

Sweden has an age distribution that is approximately of the same width near its base as at the apex. What does this indicate?